there are a lot of calculators where you input info like your hash power, electricity costs and so on and you'll have the values...
The only problem is that this calculators doesnt consider the price that the coins will reach... I honestly think if you consider the price the coins can reach in the long run, mining could be really profitable... But if you're doing that as your mainsource of money, maybe it's not the best way to invest your time and money...
Nah, this is just two machines we have doing nothing at my home that I turned on and tested mining possibilities on them. At this point I'm considering biting the bullet and buying some 570's and throwing together a couple of mining rigs. Just wanted to really get any advice on my current setup and if there was more I could sqeeze out of it before giving up and expanding.